Re: [edk2-devel] [PATCH v2 2/2] ArmVirtPkg/ArmVirtQemu: Avoid early ID map on ThunderX

[Marc Zyngier <maz@kernel.org>]

On Thu, 26 Jan 2023 12:01:51 +0000,
Gerd Hoffmann <kraxel@redhat.com> wrote:
> 
> On Thu, Jan 19, 2023 at 02:21:30PM +0100, Ard Biesheuvel wrote:
> > On Thu, 19 Jan 2023 at 13:55, Oliver Steffen <osteffen@redhat.com> wrote:
> > >
> > > Quoting Gerd Hoffmann (2023-01-19 13:00:21)
> > > >   Hi,
> > > >
> > > > > > I tried the most recent Qemu master (v7.2.50) and also v7.0.0,
> > > > > > on the 5.14 (RHEL) kernel and on 6.1.6-200.fc37.aarch64 (from Fedora).
> > > > > > No luck.
> > > > > >
> > > > >
> > > > > Does that include a backport of commit 406504c7b0405d74d74c15a667cd4c4620c3e7a9?
> > > >
> > > > Probably not given that fedora kernels are almost vanilla and the
> > > > backport landed in stable in v6.1.7 (commit 9a1195c584321).
> > > >
> > > > Oliver: try pulling the latest kernel directly from koji:
> > > > https://koji.fedoraproject.org/koji/buildinfo?buildID=2112315
> > > >
> > > > take care,
> > > >   Gerd
> > > >
> > >
> > > Thanks for the koji link, Gerd.
> > >
> > > It works with 6.1.7-200.fc37.aarch64.
> > > Perfect.
> > >
> > > Thanks Ard, thanks Marc!
> > >
> > 
> > Thanks for the report. Up to this point, Marc is the only one who had
> > managed to reproduce this afaik, so having another data point where
> > the fix works as intended is rather nice.
> 
> One more data point:  This also gets things working again on the
> raspberry pi 3.  Well, sort of.  There still is some timer problem
> (it waits forever on the splash screen).  That might also be some
> qemu bug though ...

RPi3 as a host? Using the QEMU-provided GIC emulation? I wouldn't be
surprised if that broke ages ago as nobody really tests this
configuration. If you can pinpoint the last state where this actually
worked, I'll try and have a look.

But this sounds unrelated to the page fault handling that my patch was
fixing.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.